The Doctor (Patrick Troughton), Jamie (Frazer Hines) and Zoe (Wendy Padbury) find themselves pulled out of reality and plunged into the Land of Fiction, where mythical creatures come to life. They must battle a Unicorn, Medusa and the Minotaur, with a little help from Jonathan Swift's Gulliver, D'Artagnon and Rapunzel. But who is the real enemy, and what does he want with the Doctor?